Improvement in apparatus for bending corrugated plates of metal



UNITED STATES PATENT OFFICE.

RICHARD MONTGOMERY, OF NEW YORK, N. Y.

IMPROVEMENT IN APPARATUS FOR BENDlNG-CORRUGATED PLATES 0F METAL.

To ali whom it may concern.:

Beit known that I, RICHARD MONTGOMERY, of the city, county, and State of New York, have invented a new and useful Improvement in Formers forOurviug land Shaping Corrugated Metal for ShipRibs, Car-Frames, and other Purposes; and the; following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which-` Figure 1 shows aside View of the former for metal with the section of a curve compressed therein. Fig. 2 is the end view of the same former. Fig. 3 represents a perspective view ofthe former for bending curves in sheets or plates of corrugated metal.

My invention consists in the construction and'arrangement offormers or `dies so shaped and itted to each other as to prevent the spreading or crinkling ofthe layers of, eorrugated beams or plates while in the process of being bent in curves for the ribs of ships, the frames for railroad-cars, and for various other building purposes.

To enable others skilled in the art to make and use my invention, I will describe it, referring to the drawings and to the letters of reference marked thereon.

The base A is made of wrought or cast iron, having as many flanges or elevations a a and corresponding recesses or hollows, b b, as are necessary to receive the width of the plates-of corrugated metal to be bent or curved, the upper surface being sunk or hollowed inthe center, so' as to form the segment of a circle of any given diameter that may be desired. rIhis block or base A forms the matrix of the machine, into which is itted a circular block or die, B, having a series of iiange's, c c, and recesses d d, corresponding with and fitted into the matrix, leaving only just the space on all of the sides of the thickness of metal previously wrought into corrugated beams or plates.

The male block or die B is fitted to move up and down in guides C C, so that it will always come to the right position and not mar or strain the metal. The machine for light work may be operated by a screw, D, andlever, as shown in the drawings; or any well-known mechanical device whereby a great power is obtained may be employed to operate it to any required extent.

It has been found to be utterly impossible t0 bend corrugated beams or plates into curves and keep the corrugations regular and equidistant from each other. They will either ilatten and spread out or crinkle into irregularities, so as to greatly impair thestrength of the metal at the very points Where the strength is most required; but by my improved mechanism not only are all of those objections removed, but a great advantage is derived by imparting a stiffness and rigidity to those parts and places in the metal most needed.

In building the hulls of ships the iron ribs can be bent or curved with such inclinations as to give the exact form to every part, so that the covering will iit up close to the ilanges toas/ be secured. ln order to do this effectnally it` becomes necessary to have formers to givethe curves and also the necessary inclination to the risers to round off and give the proper shape to the ends of the vessel, and for various other purposes in modern architccturebeams are required to be formed into antcllipsis or asemicircle to support arches and for ornamental work, and these require formers constructed as above described.

What I claim as new and useful, and desire to secure by Letters Patent, is-

The construction and arrangement of form-A ers so shaped and tted to each other as to prevent the spreading or crinkling of corrugated beams or plates while in the process of being bentintoeurves,in the mannerdescribed, and for the purposes herein set forth.

RICHARD MONTGOMERY.

Vitnes-ses:

S. W. WOOD, J. B. WOODRUFF. 

